Polyurethane Sealant 521

PU sealant with high adhesion strength, aging resistant, vibration exhaustion resistant, low temperature resistant

PU 521 is a multifunction gun grade
polyurethane based construction sealant
, it is of low modulus and cures by reaction with atmospheric moisture to form a soft rubber like material with moderate elasticity and hight adhesion strength.

Where to use
polyurethane construction sealant for sealing cracks, construction joints, doors, windows, roofing, gutters, sills, basements, vents, skylights, wall penetrations, and precast panels.

Advantages:
mildew proofing, Meet national standard for sealing of drinking water pipe.
One component, no need of mixing.
Easy for applying.
excellent elasticity and adhesion strength.
Excellent durability, weathering resistance..
Self bonding, easily for repairing.
three kinds of colour available.
600, 400 cc aluminium foil packaging, 310 cc cartridge package for choice.
Can be painted and abraded.

Testing Items
Performance
Appearance
Black/White/ Grey homogeneous paste
Densityg/cm3
1.35±0.5
Touch Dry time(min)
≤180
Curing speed(mm/d)
35
Volatile content(%)
≤4
Shore A hardness(A°)
35±5
Stretch modulus (Mpa)
≥0.4
Elastic recovery rate(%)
≥85
Elongation at break(%)
500
Extrudability (ml/min)
≥80
Sagging properties(mm)
0
Pollution properties
0
Application temperature()
+5+35
Shelf life(month)
9